Printing-telegraph system.



C. G. ASHLEY.

PRINTING TELEGRAPH SYSTEM.

APPLICATION FILED FEB.6, 1911. RENEWED FEB. 9.1914.

1,164,907. Patented Dec.21,1915.

3 SHEETS-SHEET l.

r S S 34 2o- J T22 r 1 1 J5 1 1 Z5 FIG. I.

FIG. 2.

FIG. 4'. W 24- MTNEssEs=- INVENTOR flh- MiM%;

ATTBEE Y Patented 1360.21, 1915.

Fra

C. G. ASHLEY.

PRINTING TELEGRAPH SYSTEM. v

APPLICATION FILED FEB. 6. 1911. RENEWED FEB. 9.1914.

1,164,907. Patented Dec.21, 1915.

3 SHEETS-SHEET 3.

MTNEssEs I N VEN'IO'R,

ATTORNEY.

COLUMBIA FLANOIJRAPH C0.,WASH|NGTON. D. c.

cii s cLQA srILEY, OF CHICAGO, ILLINOIS, ASSIGNOR T0 GENERAL ENGINEERING -,-;A1\TD CONSTRUCTION. coMrANY, LIMITED, or TORONTO, CANADA, A- CORPORATION a specification. 1

*My invention embodies a novel improvement in automatic printingtelegraph systems of the class using printed characters which from the nature of their making may be termed composite characters.

With regard tothe method of producing the printed characters, printing telegraph systems may be divided broadly into two classes, those employing a plurality of printing type faces each type face representing a "complete character .and controlled-electrically over the transmission line so as to be operated singly and successively to print on a recording surface, and those systems having a comparatively small number-of print- ;ing types, each type representing one or more component parts or elementsofa completed 1 character, the characters being formed by imprints,in proper relation from a plurality of the smaller number of component printing types representing the resp'ectivecomponent parts of the complete characters.

My invention has as its principal object to; greatlysimplify the circuits and apparatus of systems of the latter class." This I accomplish by reducing the number of receiving magnetsto a minimum by an improved-design of printing pen member, and by an arrangement of apparatus and system ofoperating circuits which enables me to selectively imprint a plurality of type faces with a transmitter of minimum parts, employing a transmitting tape of a simplicity never before attempted in printing telegraph systems which record characters of the R0- man alphabet.

In the figures which accompany and form a part of this specification and in which like numerals designate corresponding parts throughout; Figure 1- illustrates in diagram printing type faces-asthey would appear the apparatusand circuits at both a receiving and transmitting station and the conductors connecting them. Fig. 2- is-a magnified view of the monogram or imprints of the PRINTING-TELEGRAPH SYSTEM, I

Specification of Letters Patent. P t t d' 21 1 15 Application filed February s, 1911, Serial No. 606,734. Renewed February 9, 1914. Serial No. 817,670.

were all of the types imprinted upon a motionless recording surface. Fig. 3 shows a. section of transmitting tape perforated to send the letters .A and J by means of the transmitter illustrated in Fig. 1. Fig. 4 lllustrates in diagram a preferred embodiment of my device and discloses the circuits and apparatus at both a receiving and trans mittlng station and the conductors connectlng'them. Fig. 5 shows a die plate or templet desirable for perforating the transmitting tape for use with the system disclosed in F g. 4:. Fig. 6 shows graphicallythe periodicity of the voltage of the current used to effect the selection of the imprint of the type faces of the device of Fig. 4 and is so placed with relation to Fig. 5 as to clearly disclose the time relationship existing between the magnet selection currents and the imprint selection currents. Fig. 7 illustrates asectional transmitting tape perforated to form all of the characters necessary to transmit intelligence in the Roman alphabet with the device of Fig. 4:. Fig. 8 illustrates in diagram the apparatus and circuits for the transmltting and recording of simultaneous messages withthe device of Fig. 4. Fig. 9 illustrates in diagram the receiving-cir cults and apparatus of- Fig. 8 showing an alternative method of supplying the recording current.

Describing first the receiving device and circuits in order that the requirements of the transmitting devices may be more fully understood, Fig.1 shows in diagram at the left the receiving device which comprises a pair of electromagnets 20 and 22 polarized by means of the permanent magnets 10 and 12. The electromagnets 20 and 22 are so wound that when placed in series each to each and connected with one of the line conductors and ground, an impulse of current of'one polarity over the line and ground will cause their cores to assume unlike polarities While an impulse of current over the line and ground in the opposite directi'on will cause areversal of the previous polarlty. The permanent magnets 10 and 12 when the electromagnets are denergized,

cause like poles on each of the free eXtremities of the electromagnets 20 and 22. The pole faces of the electromagnets 20 and 22 are provided with insulation as 20' and 22. Armatures 1 and 2 are' pivoted at one ex-' I typefaces as l, of the spring 1 tremity andextend beyondthe pole faces of the magnets 20 and 22 and are attracted thereby. Each armaturecomprises two metallic strips, each strip being insulated from its adjacent strip and from the balance of the device. Each strip bears upon its free extremity a printing type faceas 1, 1 2 and 2, the imprints of the faces being shown greatly enlarged in Fig. 2. The strips bearing printing types 1 and-2f are connectedfl prussiate of potassium, rests on the surface of the anvil in a posltionto receive the impressions from any one of the printing-type faces. It willbe noted that; if animpulse of predetermined polarity be sent overline conductor34: and ground, one of the magnets 20 or-22' will be energized to annul its normal polarization, and its armature, bearing 1 will under the influence be brought into contact with the recording surface or tape 31, and that, depending upon the polarity of the potential impressed on the pens 1 andli, either face may for with an electrolyte such as that mentioned and withiron printing faces and a. platinum anvil,'only the type face which is at apositive potential with respect to the recording surface and anvil will be 1mmay be madesuccessively printed; thus by means of a transmitting device which will selectively operate either "armature 1 'or 2'and simultaneously selectively place positive potential with respect to the recording surface 31 on either of the pen 'faces borne by the operated armature, either of the four pen faces 1, 2 1 or 2 may be selectively imprinted on the record'- ingsurface 31 and a plurality of imprints to form complete and legible characters. Such a transmitter is shown at the right of Fig. 1 1n which a pair of direct current dynamos 23 and '24 or other sources of current have their terminals of opposite polarity connected together and to the ground 25, while the positive' terminal of dynamo 23 is connected tob'ru'shes 14: and l f -and the-negative terminal of dynamo 24 is connected tobrushes 1 14" and- 14 A brush 13 is 'of suflicient width to bear upon both brushes 14: and 14 and make contact therewith while a brush 16 is of suflicient wldth to bear upon be selectively imprinted both brushes 14 and 14? andmake contact therewith. The brushes 13 and 16 arenormally held out of contact with their adjacent pair ofbrushes by a transmitting tape 17. It'will be noted that by the proper transverse spacing of a perforation intape 17 with respect to the brushes 1 1 and 1 1 a positive or negative impulse of current may be sent over line conductor 3 1 and ground :to' operate selectively-either, armatures 1 or 2' and cause the pen faces borne thereby to make contact with the sensitized tape 31, and that by a proper transverse spacing ofthe perforations in the 1 tape 17 with respect to brushes .14 and 14 the po-, tential of the pen face with respect to the sensitized tape 31 andanvil 30, may over conductor 35 and ground be changedat will. Hence by a predetermined spacingin the tape '17 of these two sets of perforations above noted, either armatures 1 or 2 may be selectively operated and either ofthe pen faces-which they bear may be given a positive potential with respect to thesensitized tape 31. to cause. the recording; upon the tape 31 of a'particular type face.

Referring now toFig. 2 which shows an enlarged view of the pen faces as they would appear were allv simultaneously imprinted on a recordingsurface, pens .1,2 andfl are each in width-equal. to the'width or; a complete normal character such as H. The width of -a complete normal character is divided into eight arbitrary units, each pen being separated from its fellow by one of. these arbitrary units. Pens 1 and l -are carriedby armature lFig. 1, while pens2 and 2 are carried by armature 2.

Referring to Fig. 3 which shows a section of transmitting tape perforated to send-the letters A and J by meansof thedev-iceof Fig. 1, longitudinal lines 15, 15 15 and 155 2Fandl etc. areplaced a distance-apart equalto the unit of width ofthe pen faces 1,-2 and 1 Thus, in order toselecteither pair of pen faces 1' and 1 or 2 and 2 ,111

is only necessary to place a perforation along;

line 15 or 15*, and to select the particular pen face of a pair as 1 and 1 it is necessary to place a perforation opposite the perforation in the line-15 or 15 butalong theline 15 or'15 Conceive now thetape 17 to move in a direction as indicated by the arrow of Fig. 3 between the brushes 13,16 and 14., 14 14 and 1st of-'-Fig. 1 at a speed which allows one transverse spacing of" the tape 17 to pass through the brushes. while a;

corresponding interval in the recording tape 31' is passing from right to left-under the pen faces as vi'ewedin Fig. 2. The -1letter A may now be recorded as follows: The tape 17 passes through the brushes of thereby sending a positive impulse over line conductor 34 through magnets 22 and 20 and ground and causing armature 2 bearing type faces 2 and 2 to be released from the in-' fiuence of polarizing magnet 12 and under the influence of spring 2 bring its pen faces into contact With the receiving tape 31 and simultaneously with this impulse, an impulse of negative polarity is sent which traverses ground, pen face 2*, recording tape 31, anvil 30, again tape 31, pen face 2 line conductor '35 and is grounded through the transmitter.

This causes pen face 2 to become positive with respect to the recording surface 31 and hence causes its imprint thereon, but not causing the imprint of pen face 2 Then after a time interval of eight units, pen 2 is again printed as above indicated and after two time intervals, pen 2? is printed by sending through conductor 34 a positive impulse and reversing the direction of'the current flow through pen faces2 and 2 which causes pen face 2 to become positive with respect to the recording surface 31, thus imprinting pen 2 and not pen 2 and again after one time interval sending a negative impulse through conductor 34 which causes the operation of armature 1 to bring its pen faces 1 and 1 into contact with the recording surface 31 and sending a positive impulse along line conductor 35 through pen 1, anvil 30, pen 1 and ground, which as pen face 1' is therefore positive with respect to the recording surface 31, pen 1 is imprinted and not pen 1 Similarly the letter J may be recorded as may all the characters of the Roman alphabet as will be subsequently more clearly disclosed.

Referring to Fig. 4 in which I have shown a preferred embodiment of my invention, the receivingdevice and its circuits are the same as that of Fig. 1; the transmitting device and circuit shown at the right differ however greatly from that of Fig. 1 and comprise a shaft 13 upon which is rigidly mounted a metallic drum 14- bearing a median row of equally spaced insulating, invaginating projections 14 A brush 11 is rigidly mounted upon the frame of the transmitter and makes contact with the drum 14 upon either side of the row of pro- 1 jections 14 Brush 11 is connected to line connector 34 and through the electromagnets 22 and 20 of the receiving device to ground 32. A pair of wipers 15 and 16 are rigidly attached, parallel to each other, to a shaft '13 and are insulated therefrom. Shaft 13 and shaft 13 are geared together so that while shaft 13 is rotating through one complete revolution, shaft 13 is rotated through an angle which is defined by the distance between any two projections as 14 on drum 14. A pair of annular commutators 27 and 18 are rigidly attached to the frame of the transmitter and are so placed as to encircle wipers 15 and 1.6 respectively,

to permit these wipers to make contact between the segments of their respective commutators. Commutator 27 is divided into one substantially semicircular segment and two substantiallyquarter-circular segments, the semlcircular segment being connected through conductor 35 with the armatures 1 and 2 of the receiving device and through them with ground 32. One of the quartercircular segments of commutator 27 is connected to the negative terminal of dynamo 23 while the remaining quarter-circular segment is connected to the positive terminal of dynamo 24; the remaining terminals of dynamos 23 and 24 are connected together and to ground 25. Commutator 18 comprises one substantially semicircular segment and four substantially eighth-circular segments, the semi-circular segment being connected through conductor 19 with the journal of the shaft 13 and thence to the metallic drum 14. A constant relation is at all times maintained between the positions of each wiper 15 and 16 with respect to the segments of their respective oommutators 27 and 18 and the position of the projections 14 of the drum 14 with relation to the contact line of the brush. 11 on the drum 14. This relation is such that as the drum 14 rotates a distance equalto that defined between any two projections thus carrying the contact line of the brush 11 with the drum 14 through the same distance, the wiper 15 makes one complete revolution, thereby placing two negative impulses and two posi tive impulses on conductor 35 and ground. Simultaneously wiper 16 is making one revolution, thereby placing four negative impulses and four positive impulses on conductor 34 and ground. In effect this places an alternating current of a definite periodicity on conductor 34 through electromagnets 22 and 20 to ground while an alternating current of one half the periodicity of that placed on the electromagnets 22 and 20 is placed on conductor 35 through the pen faces 1, 1 and 2 2 to ground. The relation of the rotation of the wipers 15 and 16' with relation to the contact line of brush 11 with drum 14 and the projections 14 being such that a positive potential is always impressed on the drum 14 by means of commutator 18, and a negative potential is impressed on the line 35 by means of the com-- mutator 27 while the contact line of brush 11 is passing any projection as .14 on drum 14.

Referring to Figs. 5 and 6 which show respectively a templet for perforating the tape to send all the impulses necessary to record all-the characters in theRoman a1- phabetv with the device. of Figs 4, and the periodicity of the current impressed upon thepen faces by; meansof commutatrn-s 27 and-wiper 15. The perforations as 49, 3, 2,

and 1 aref placed along aline 11v and are spaced'longitudinally by equal units which correspond to the unit of widthof the pen faces 1", '2 and 1 of Fig. 2.v A row of.per-

perforations'along the line 11. of Fig. 5,

while the potential of the pen faces as 1', 1 with respect to the anvil 30 and rece vlng tape 31 may be changed twice. "Thus a posi v tive and a negative impulse may be sent.

over conductor 34 through magnets 22 and 20 to ground to operate armatures land 2, while a negative impulse is impressed. on one of each pair of pen faces borne by armatures 2 and 1 to cause the p inting of that pen of each pair which is ata positive potential with respect to anvil30 and again, a positive and negative impulse may be sent over conductor 34 through., electron1agnets 22 and 20 and ground to cause the operation of armatures 2 and 1, while a positive impulse is impressed on one of each pair of pen faces borne by armatures 2 and 1 to cause the printing of the remaining one of plet Fig. 5 is shown in Fig. 7 and illustrates each pair of pen faces, thus one of the four pen faces as 1', 1 2 and 25 may be 1 selectively imprinted by means of a single row of contact perforations in tape 26 when provided with a row of registry perfora tions and passed between drum 14 and brush 11. By properly spacing the perforations along the line 11 as shown in the templot Fig. ,5 and passing the transmitting tape 26 so perforated through the transmitter ind o recording tape 31 through the receiver at a speed corresponding to thetransmission tape, all the characters of the Roman alphabet may be recorded on the receiving tape 31.

A tape which maybe conceived to have been perforated through the use of the temthe various spacings and groupings of perforations along the lin'e ll' and their relation to the registry. perforation along line 14 to effect the recording of all ofthe characters of the Roman alphabet.

The manner .of forming legible characters by the use of this tape is as follows :1As-

suming that the transmission tape 26 is,

being drawn betweenjthe drum 14 and brush ing tape 31 is being drawn at the same or a;

proportionalflineal rate from right to between theanvil 130 and the symbol formed b the pen facesfl 1 2 and 2% of the re ceivingdevice Fig. 4 as viewed in Fig. 2.-

Any two consecutive perforations in the tape are spaced a distance apart equal to oneeighth the distance between any two registry perforations, there being thuseight tape units between any two registry perforations and these tape units of the transmitting tape;- corresponding on the receiving tape togo ne-t eighth the widthof the pen faces 1, 2 and l through the proper speed a relation of the.v two tapes. Then in recording the letter""A the first perforation 4 which is spaced on the same transverse line with the-registry perforation in the transmittingtape 26'," allowscontact to be made between line con ductor34 and the positive terminal offdynamo 24 through drum 14 and commutatorv 18 and thus places a positive impulse of current through the electromagnets 22 and 20 m; thereby 'annuls the normal polarization of magnet 22 and causes armature 2 to, bring its pen faces 2 and 2 into contact withthe" receiving surface 31, and asncommuitat or 27 is ina position which allows of a negative ise potentialito be impressed upon pen faces 32 through pen face 2 through sensitized tape'31 to pen face 2 and thence through line conductor 35 and commutator 27 to the negative terminal of dynamo 23, thereby causing pen face 2 to be positive with re.- spect to the sensitized tape 31 and thencecausing its imprint and not the imprint ofpen 2 After the tape 26 has moved eighttape units, thecontact line of brush 11 with drum 14 will again be opposite a projection as 14'? and each wiper 15 and 16 of commutators 27 and 18' will have made one revolution, which will allow of a positive. impulse being sentthrough a perforation in the tape'26 at that instant along conductor 34 through 1 electromagnets 22 and 20 tooagain' actuate armature 2 to bring its penfaces into'conjtact with the receiving tape 31. f A negative impulse of current will be impressed upon the pen faces which cau'ses whenthey are in contact with the receiving tape 31, a current to flow as before from ground to pen face 2 sensitized tape 31 and thence through pen face 2 line conductor 35, commutator 27:, to negativeterminal of dynamo .23 thus-- again imprinting pen face 2 a distance away from its previous imprint on the receiving tape of eight tape intervals" After a lapse of two tape intervals a perforation in the Y tape as 2 will,as' wiper l6 has since the previous impulse made one fourth of a revolution, allow a positive impulse of current to flow through conductor 34 through magnets 22 and 20 again actuating magnet to release its armature 2 to bring its pen faces into contact with sensitized tape 31 and as wiper 15 has since the previous imprint made ,onefourth of a revolution'a positive potential is impressed on the pen faces 2 and 2 which, when they are in contact with the receiving surface 31, causes a current to flow from the positive terminal of dynamo 24 through commutator 27 line conductor 35 through pen face 2 receiving tape 31 to pen face 2 and thence to ground, thus im printing pen faces 2 and not 2 This imwill annul the normal polarization of magnet 20 and allow its armature 1 to bring its pen faces under the influence of spring 1 into contact with the receiving surface 31, and simultaneously with such contact as a positive potential is impressed on the pen faces through commutator 27 over conductor 35 a current will flow from the positive terminal of dynamo 24 through commutator 27 and line conductor 35. through pen face 1 tape 31 to pen face 1 thence to ground 32, thus causing the imprinting of pen face 1, the vertical leg of which coincides with a portion of the first imprint of pen 2, while its horizontal portion will abut the last imprint of pen 2 to form the letter A. In a similar manner all; the characters of the Roman alphabet may be recorded by the use of a tape perforated as shown in Fig. 7. It will be readily noted that while the system disclosed in Fig. 4 is cyclic in its operation, that of Fig. 1 is not, the armature actuating potential and the printing potential being selective arbitrarily by the transverse spacings of the perforations in the tape 17, Fig.3.

It will be noted that all the characters of the English alphabet may be recorded by the use of the device of Fig. 1 by spacing the perforations as in the tape of Fig. 7 the potential of the magnet actuating current and printing current being determined by spacing the perforations along the lines 15 .15 or 15, 15 respectively.

Fig. 8 illustrates indiagram a device for sending simultaneousmessages with the system' disclosed in Fig. 4 and-in view of the foregoing is largely self-explanatory. The armature actuating magnets 20, 22 and60, 62are connected in series each to each and conductors 34 and Y34 respectively. Conductor 34 is connected to brush 81 while conductor 34 is connected to brush l1. Brush 81 bears upon a metallic drum 84 such as thatof Fig. 4, while brushll bears upon a similar drum l4. Pen faces 1, 41, 2 and 42 are connected togetherv and to line conductor: 35, while pen faces:l ,.41 2 and 42 are connected together and to ground 32 through conductor33. Conductor 35 is ,con-

nected to commutator 27. Commutatorl8 is connected to the journal of shaft 13 while dynamos 23 and 24 are connected to commutators 27 and 18 as indicated. Shaft 13 bears wipers 1.5 and 16 and is gearedto shaft 13 as indicated so that a ratio speed is on drums l4 and 84 and record their messages on the receiving tapes 71 and 31 respectively.

An alternative method of supplying the imprinting currents to the pen faces is' shown in diagram in-Fig. 9 in vwhichthe connections are similar to that of Fig. 8 with the exception that the cyclic wire 35 of commutator 27 is connected through the winding of a polarized relay 65 with ground 32, while the penfaces l, 41, 2 and. 42 are connected together and through conductor '68 with the positive terminal of battery 63 and the negative terminal ofbattery 64 while pen faces 1 41 ,2 and 44 are connected together and through conductor 67 to the armature of the polarized relay 65. One contact 65 of relay 65 is connected with the negative terminal of battery 63, while the other contact 65 is connected to the positive terminal of battery 64. Relay 63 is sopolarized that when a negative impulse of current is placed through its coils by means of commutator. 27, conductor 35 and ground, its armature willmake contact with contact 65 thus placing a negative potential from battery 64 through conductor 68 on pens 1, 41, 2 and 42 and positive potential on pen faces 1241?, 2 and 42 with respect. to the sensitized tapes 31 and 71, and when a positive impulse of current is placed through the-relay 65, the relay will make contact with contact 65, thus placing positive potential on pen faces 1', 41, 2 and 42 and negative potential on pen faces 1 4'1 2 and 42 with respect to the tapes 31 and 71. This accomplishes by local battery the selective imprinting of any particular pen face as before described.-

This method has the advantage that the imprinting currents are always of a definite value independent oftthe length or electrical condition of the transmission line.

"placed in connection With the ground and It is obvious fromfthe foregoingthat a 13.0

of alternating current generators may be substituted for the -commutators'27 and -18, the one substituted'fo-r commutator 27 having one half the frequency of the one gtakingthe place of'commutator 18, and

eliminate the use of the direct current "sources 23 and 24, thus reducingthe transmission mechanism to a minimum of parts 7 *"of extreme simplicity." It is further obvious in order-that the transmissiontape shall not become too fragile because of the -large number of substantially adjoining perforatlonswhlch may occur in any particular grouping of perforations along the single line 11 that the perforations may be spaced with the same longitudinal spacing in two rows one either side of'the central row of registry perforations and thus minimize the fragility of the perforated tape and increase wearing qualities during transmission. i i While'I have illustrated onlya few embodiments of my device, it is to be clearly understood that I may make numerous -'changes in the details of 'either withoutdes parting from the spirit or narrowing the scope of my invention.

Having thus described my invention, what 'I claimas new and desire to "secure by United States Letters Patent,

is as followsz 1.. In a system of printing telegraphy, a plurality of printing elements, 'a receiving surface adjacent thereto, means for bringing said elements in predeterminedgroups into contact w th sa1d recelvmg surface and means for causing any element of a group in contact with'said'receiving surface to re- -cord 1ts imprint thereon.

2. In a printing telegraph system, a receiver, a transmitter and conductors con- 'necting them, said receiver comprising a receiving surface and :a plurality of groups'of printingelements, means for placing in a condition of potential operation a group of said printing elementsand further means "for selectively printing on said receiving surfacev any one-of said elements of said group.

; 3.' In a prlnting telegraph system, a re-' ceiver, a. transmitter and conductors connecting them, sa d receiver comprlsing a recelvmg surface and a plurality of printing elements, meansoperable over said conduc tors whereby a particular group. of said printing elements maybe caused to make contact with said receiving surface and fur-; thermeans operable over said conductors whereby any one of said elements of said group may be recorded on said surface.

4.;In a printing telegraph system, a receiver, a transmitter'and conductors connecting them, said receiver comprising a re-' cervlng surface and a plurality of groups of prmtmg elements, the" elements of each group being simultaneously operable "over said conductors to make contact with said ireceiving surface and further means operable over said conductors'whereby any one of saidzelements ofsaid group of elements.

may be recorded on said receivingsurface;-

' 5. In a system of: print1ng telegraphy,' a receiving station, a transmitting station and conductors connecting them,-means at said transmitting station for impressing upon said conductors two independent currents ofvariant periodicity, a plurality of printing elements at said receiving station and means at said receiving station for utilizing one of said currentsto efiect the selection'of...

a group of said printing elements and fun ther means'for utilizing the other of -'said currents to efi'ect the imprintingjon afrecording surface of any one of" the elements ofsaidgroup."

6. Ina system of printing telegraphyya receiver, a transmitter and conductors'connectin'g'them, said receiver comprising [a pair of electro-magnetically' operated armatures andareceiving surface, each of said armatures bearing a plurality of printing elements, means embodied in "said transmitter for impressing on said conductors current impulses for selectively operating said armatures and further means embodied in said transmitter for impressing onsaid conductors current impulses for selectively of said printing "elements;

7. In a system ofprinting telegraphy, a

receiver, atransmitter and conductors conjnecting them, said receiver comprising ,a

pair of electro-magnetically operated armatures and a receiving surface, each of said upon each of said armatures, a recording surface ad]acent to said print ng elementsmeans for selectively operatingsald ar s tures to" cause'said printing elements borne thereby to make contact with said recording surface and means for selectively imprinting any one of said elements on said surface from a group borne by a selected armature.

9.- In a printing-telegraph system, a-"re ceiver, a transmitter and a pair of conduc tors and ground connecting them, said receiver comprising a receiving surface, ap'air' of actuating electromagnets, a pair of arma tures controlled by said elctromagnetspa.

printing on said receiving surface any-one ductor s and groundwhereby a particular pair of said elements may be caused to make contact with said receivingsurrace and i'urther means. operable over the other of said conductors and ground, whereby either of said elements in contact with said. receiving surface maybe recorded thereon. 10. In a printing telegraph system, two Elinewires, four pen members, an electrolytic record vsheet, magnets for operating said pen members to strike the record sheet in pairs, a circuit over onevof said line wires to select and move either pair of pen membersinto contact with the recordsheet, and acircuit over the other line wire to polarize properly only one pen member of the selectedpair. i I

11. In a printing telegraph system, aplurality' of line conductors, electrolytic ;recording sheets, a'plurality of printing pens operativeover said line conductors to strike said recording sheets in pairs, and an electrolytic circuit operated over one of said line conductors to polarize operatively only one-of the pens of each-pair.

12. In a printing telegraph system, two line'circuits, four printing pens, an electrolyti'c sheet, means operative over one of said line circuits to cause two of said pens to make contact with said sheet, and means operative over the other of said line circuits to polarize selectively only one of the said two pens. 7

13. In a printing telegraph system, a transmitter, a receiver, a line connecting them, said receivercomprising an electrolytic recording sheet and printing pen members adjacent thereto, said members classified into pairs, means in the transmitter for rendering the pen members of a pair alternately potentially operative to record elec trolytically upon said sheet, and means in said transmitter for causing any pair of pens to strike said sheet.

14. In a printing telegraph system, a plurality of transmitters, a plurality of receivers, conductors connecting each a transmitter to a receiver, said receivers each comprising an electrolytic recording sheet and printing pen members adjacent thereto, said members classified into pairs, means associated with the transmitters for rendering the pen members of all of the pairs alternately potentially operative to record electrolytically upon the recording sheet, and means for causing any pair of pens to make contact with the recording sheet.

15. In a printing telegraph system, a plurality of intelligence-transmission conductors, a transmitter at the sending end of each of said conductors, a receiver at the receiving end of each of said conductors,

each-of said receiVersadapte'da to operate by cooperation'of magneticand electrically polarized parts comprised in each rece ver,

means in and associated with the-said transmitters for controlling the electromagneti ditional line conductor common-to all of said receivers and controlling the electrical polarization of the parts comprised mail of said receivers, said control being governed by means at the transmitting station directly connected to said additionaluline conductor and associated with said plurality of transmitters.

16. .In a printing telegraphsystem, a plurality otreceivers, each containing movable and polarizable printing pens, line wires individual to said receivers and connected to parts in said IBCGIVQI'S'CODtFOlhHg movement of said pens, and an auxiliary line wire common to all'said receivers and connected to-parts in said receivers controlling the polarization of said pens, a plurality of transmitters transmitting to said individual line wires impulses controlling the movement of said pens, and-a device auxiliary to said transmitters and'transmitting over said auxiliary line wire electric currents for the control of the polarization of said'pens.

17. In a printing telegraph system, a plurality of receivers, each'containing movable and polariza'ble printing pens, line Wires iiidividual to said receivers and connected to parts in said receivers controlling movement oi: said pens, and an auxiliary line wire common to all said receivers and connected to parts in said receivers controlling the polarization of said pens, a plurality of transmitters transmitting to said individual line wires impulses controlling the movement of said pens, and a device auxiliary to said transmitters and transmitting over said auxiliary line wire electric currents for the control of the polarization of said pens, each receiver with its connected line conductors and transmitter being operable independently of any other receiver for transmitting intelligence independently.

18. A monogram composed of four printing characters representing elemental lines by the combinations of which the letters of a recognized alphabet are constructed, a division of the monogram into units by which all printing charactersvand their composites are measured, and a moving surface upon which the characters are printed, in combination with an alternating current having its alternations corresponding to the units of division and the rate at which the surface is moved, means by which the alternating impulses of the current cause the characters to be printed upon the moving surface, and means for intercepting a pori ingtimed to each correspond to-a movement of one unit of the receiving sheet, and means ,for'intercepting allbut selected ones of such impulses.

'20. The combination With a plurality of sending devices at a sending station, and an equal plurality of receivingsdevices at a receiving station, of means for sending an equal plurality. of messages and printing the sameain Roman'x characters at the receiving station by sending-electrical impulses over an equal plurality of Wires plus. one.

121. A-source ofalternating current, a plurality of wir'es-over which the impulses of 1 such currentmay flow, four printing characters associated With each Wire and brought intozipri ntin'g condition by such impulses, a second source of alternating current having one-half 'the periodicity of the first source, a single line over which the impulses from the second source mayflo-w, said single" line being associated with all of the printing characters,= and means for controlling the impulses flowing-from both sources to i two Witnesses.

print in vRoman characters-rats: many: sir'nul taneous messagesastherearewviresfrom the first named source of current.

22. The combination with, ;,a plurality 0f type faces, a receiving: surface, vand electrically operated means for printing the: type upon the surface, of an" alternating: current conveyed continuously to. one part of 4 the electrically operatedmeans, a second alternating current potentially capable-oh being conveyed continuously to anotherpart of the-electrically operated means, andl means forintercepting part of the impulses of the second current, the two currents'cooperating to selectively print the type upon the surgface. 1

23. A plurality of groups "of printing pens, mechanically operating means for selecting groups and chemically operating means for causing a print to be made; by any desired pen in the selectedgroup.

'24. A plurality of. groups: of printing pens, electrically controlled meansiforgselectring groupsv of pens and'chemically opera-ting means for rausing a print to be made by any desired pen in-the selected'isgroup.

'Signed by me at Toronto, countyzofYonk, and Province of Ontario, in'the presence ;of

' CHARLES. o.,.As-nLEY.,

WVitnesses:

WM. J. HERDMAN, 'D. S. TovELL.

Copies-0t this patent mayebe obtained ,for five cents each, by addressing the Commissioner of I atnts',

Washington, 110. 

